Product Care

The top white sleep surface can be unzipped and machine washed at 40 degrees. The grey base fabric can be cleaned with a soft, damp and clean cloth using small circular motions. Using a king size mattress protector could help extend the life of your mattress.

Delivery Information

Free standard deliveries are processed via UPS. This a 1-3 day tracked service, and UPS will deliver your mattress to the first door.

Arrow XL is a Premium 2-Man Delivery Service, delivering to a room of your choice. It is a diary booking or 48-hour service Monday - Saturday when ordered before 5pm. Removal of your old mattress can also be requested at checkout. Your old mattress will be recycled.

100 Night Trial and Returns

We offer you 100 nights to to make sure the king size mattress is just right for you. If you are not 100% happy with it for any reason during the 100 day sleep trial, we will arrange a free pickup of your king size mattress and refund the cost of your king size mattress (less any delivery costs), no questions asked.

Warranty

Every Simba king size mattress comes with a 10 year guarantee. If your king size mattress fails during the 10 year warranty period, we'll exchange it for a brand new one. It's that simple!

Sustainability

At Simba, we take great care to ensure the lowest environmental impact possible from production to delivery.

Certificates

Our foams have all received the CertiPUR label, meeting the requirements of unwanted chemicals in foams. No destructive agents of ozone, heavy metals, flame retardants, mercury or lead have therefore been used for their manufacture. They are also perfectly safe and suitable for everyone.

The king size mattress for every body

Front, back and side sleepers

Face down, curled up or sprawled out? It turns out it doesn't matter. We
designed our king size mattress using data from 10 million sleepers, so however
you sleep we've got you covered.

Don't disturb your partner

Edge to edge support

Our five layers of perfect comfort are snugly surrounded by a new 360° high density foam border. It gives our mattress the edge - literally.

We call it Edge Lift. It means whether you're an all-night side-hugger or a morning percher, your Simba Hybrid® Mattress offers the same great support from one corner to the other. So you can kiss goodnight to that rolling off feeling you get from a cheaper mattress.

Try it risk-free in your own home

We’re confident you’ll love your Simba king size mattress . But just in case we’ve made it as easy to return as it was to buy.

Free delivery and returns

Every Simba king size mattress comes with flexible delivery options, including free delivery which takes between two and five working days. If you decide to return your Simba, we’ll collect it for free (and don’t worry, we wouldn’t dream of asking you to get it back in the box).

Happy king size mattress Sleepers

We're listening... Everything we do, we do to make sure you get the best night's sleep, so please leave a review below and tell us what you think of Simba.

About the Product

What's a king size mattress?

A king size mattress measures 150cm x 200cm x 25cm, making it a little wider and longer than a standard UK double. In old money, it's 5 feet wide.

Why choose a king size mattress?

King size mattresses offer royally generous space for any sleeper - even sharing a bed, it's almost as big as having two small singles side by side! They're also great for families where the little ones pile in. As such you'll want to consider the space your bed is going in, and whether there's enough clearance space (remembering the frame is often a little wider than the mattress itself). Placing them on a higher base or looking at ottoman or divan styles lets you take advantage of the large surface area to use the space under the bed for storage.

What kind of king size mattresses are available?

Traditional spring king size mattress: Usually found in guest bedrooms as an economical option, the springs in these old fashioned coil mattresses are joined to each other. So there's plenty of support, but the bouncing can get a bit much (if it's not creaking too).

Pocket spring king size mattress: Pocket spring mattresses offer more flexible support by placing each spring individually into a fabric pocket. These mattresses often still use bigger, cylindrical box springs, with all the pros and cons those offer.

Memory foam king size mattress: Memory foam is a type of viscoelastic which moulds to the body, making memory foam mattresses very comfortable. However, they're also known for trapping heat and can go softer as they warm up, giving sleepers a sweaty, sinking feeling.

Latex king size mattress: Latex mattresses are made with latex foam, which is considered a natural product. Bouncier than memory foam, latex is not as good at preventing motion transfer, and tends to be heavier and more expensive.

Hybrid king size mattress: Hybrid mattresses bring together two different kinds of traditional design, such as springs and foam. This aims to combine the advantages of both, without the limitations - so you get comfort and support without overheating or bouncing around.

What's special about the Simba Hybrid® king size mattress?

As an innovative, unique hybrid mattress, the Simba Hybrid® king size mattress offers the same award-winning comfort at every size. Our British steel micro springs are smaller and lighter than traditional clunky box springs, which means that there's no see-saw effect when sharing a bed. They're also specially shaped using a patented design to move individually around the hips, spine and shoulders, providing hundreds of points of pressure relief. The Simba Hybrid® king size mattress has a spring count of 2,500 conical pocket springs, more than some traditional king size mattresses, matched to a thick layer of visco memory foam for cloud-like comfort.

The Simba Hybrid® Mattress also has a unique comfort layer made of open cell foam which, combined with the air flow offered by the spring layer and breathable sleep surface, makes for altogether cooler, more chilled out nights.